Boston Celtics rookie forward Jared Sullinger will undergo back surgery and will be lost for the season, according to multiple media reports, the latest blow to a reeling team.

Sullinger, 20, left the Celtics game Wednesday against the Sacramento Kings with back spasms and did not return. According to multiple reports, he received treatment Thursday and although he didn't participate in Friday morning's shootaround ahead of a night home game against the Magic the back problem wasn't considered serious.

Howevever, CBSSports.com reported Friday afternoon that Sullinger would, in fact, need back surgery that Yahoo! Sports said would force him to miss the remainder of the season.

Sullinger's injury is another hit to the Celtics, who were rocked last weekend when they lost All-Star guard Rajon Rondo for the season with an ACL tear.

Sullinger, who struggled with back problems in college as an All-American at Ohio State, slipped out of the lottery to the Celtics at No. 21 in the 2012 draft in part because of concerns about his durability related to his back.

He had moved into the starting lineup in recent weeks, providing the struggling Celtics some much-needed energy at forward as Brandon Bass regressed.